Speaker



FIG. 1 is a top perspective view of a speaker of the present invention;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a first side view thereof;

FIG. 5 is a second side view thereof;

FIG. 6 is a third side view thereof; and,

FIG. 7 is a fourth side view thereof. 

The ornamental design for a speaker, as shown and described. 